Standard
EN 13501-1 — Reaction-to-fire classification (Euroclass)
Clause 11. Classes A1, A2, B, C, D, E, F with smoke (s1–s3) and flaming-droplet (d0–d2) sub-classes. Untreated solid softwood ≥ 9 mm and ≥ 390 kg/m³ classifies as D-s2,d0 (CWFT, EN 14915/EN 14081). Class B-s1,d0 for timber cladding requires a certified fire-retardant treatment with EN 16755 durability class (INT1, INT2, EXT for exterior use).
The diagram below shows every direct connection this node has in the graph. Each line is one edge; expand a neighbour group below to read exactly why that connection exists and which standard or dataset it comes from.
Treatment (1)
- Fire-retardant treatment← specified under
Classification and declaration requirements for this treatment sit in EN13501-1.
Source: en13501-1
How edges in this graph are derivedWI-GRAPH v1.0.0
Species → agent edges come from the WI-SL resistance profile (0–100 ordinal scale derived from EN 350 durability class, extractive chemistry and movement). ≥70 is read as "resists well", 45–69 as "moderately resists", below 45 as "is vulnerable to".
Climate → agent edges fire when a climate's driver value (UV, humidity, salt or freeze-thaw load) is 60 or above, read directly from the climate dataset.
Treatment → agent / standard edges come from the paraphrased standards corpus used across the site (EN 927-1, EN 351-1, EN 350 clause 4, EN 13501-1).
Species → standard edges reuse the exact source list already published for each Global WoodIntel Score sub-score.
Machine-readable: GET /api/public/v1/graph?node=standard-en13501-1 · CC BY 4.0